{"id":"CVE-2026-106435","summary":"Application denial of service via out-of-bounds read in BSON Regex decoding in MongoDB Python Driver","details":"The MongoDB Python Driver's binary accelerator can read outside a buffer when an application decodes malformed BSON containing a truncated regular-expression element without a trailing NUL byte. An actor who can supply BSON to the documented decode or decode_all API can cause the application process to terminate when the C extension is loaded. The driver's normal database wire-protocol path does not reach this code.","modified":"2026-10-17T02:47:54.774037451Z","published":"2026-10-08T20:12:15.074Z","database_specific":{"cna_assigner":"mongodb","cwe_ids":["CWE-125"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/106xxx/CVE-2026-106435.json","unresolved_ranges":[{"extracted_events":[{"introduced":"0.10.3"},{"last_affected":"4.18.2"}],"source":"AFFECTED_FIELD"}]},"references":[{"type":"WEB","url":"https://jira.mongodb.org/browse/PYTHON-6110"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/106xxx/CVE-2026-106435.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-106435"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/mongodb/mongo-python-driver","events":[{"introduced":"0"},{"fixed":"5479af6315dea9bd575bb374f72b645dfacbb3c3"}],"database_specific":{"cpe":"cpe:2.3:a:mongodb:python_driver:*:*:*:*:*:mongodb:*:*","extracted_events":[{"introduced":"0"},{"fixed":"4.18.3"}],"source":"CPE_RANGE"}}],"versions":["4.18.2","4.18.1","4.18.0","4.16.0","4.16.0.dev0","4.15.1","4.15.0","4.13.0","4.13.0.dev1","4.13.0.dev0","4.12.0","4.11","4.10.1","4.10.0","4.9.1","4.9","4.7.1","4.7.0","4.6.0","4.5.0","4.4.0","4.4.0b0","4.3.3","4.3.2","4.3.1","4.3.0","4.2.0","4.2.0b0","4.1.1","4.1.0","4.0","3.11.1","3.11.0","3.11.0rc0","3.11.0b1","3.11.0b0","3.10.1","3.10.0","3.9.0","3.9.0b1","3.9.0b0","3.7.0","3.7.0b0","3.6.1","3.6.0","3.6rc0","3.5.1","3.5.0","3.4.0","3.3.0","3.4rc0","3.2.2","3.2.1","3.2","3.2rc0","3.1.1","3.1","3.1rc0","3.0.3","3.0.2","3.0.1","3.0","3.0rc1","3.0rc0","3.0b1","3.0b0","2.7","2.7rc1","2.7rc0","2.6","2.5.1","2.5","2.4.2","2.4.1","2.4","2.3","2.3rc1","2.2.1","2.2","2.2rc1","2.1","2.1.1","2.0.1","2.0","1.11","1.10.1","1.10","1.9","1.8.1","1.8","1.7","1.6","1.5.1","1.5","1.4","1.3","1.2.1","1.2","1.1.2","1.1.1","1.1","1.0","0.16","0.15.2","0.15.1","0.15","0.14.2","0.14.1","0.14","0.13","0.12","0.11.3","0.11.2","0.11.1","0.11","0.10.3","0.10.2","0.10.1","0.10","0.9.5","0.9.4","0.9.3","0.9.2","0.9.1","0.9","0.8.1","0.8","0.7.2","0.7.1","0.7","0.6","0.5.3pre","0.5.2pre","0.5.1pre","0.5pre","0.4pre"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-106435.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N"}]}